<template>
    <div class="star" :class="starType">
        <span v-for="itemClass in itemClasses" :class="itemClass" class="star-item" track-by="$index"></span>
    </div>
</template>

<script>
    const LENGTH=5;
    const CLS_ON='on';
    const CLS_HALF='half';
    const CLS_OFF='off';

    export default {
    	name:'star',
        props:{
    		size:{
    			type:Number,
			    required:true
            },
	        scope:{
    			type:Number,
	            required:true
            }

        },
	    created() {
		    console.log(this.scope)
		    console.log(this.size)
	    },
	    computed:{
		    starType(){
			    return 'star-'+this.size
		    },
		    itemClasses(){
			    let result=[];
			    let scope=Math.floor(this.scope*2)/2;
			    let hasDecimal=scope%1!==0;
			    let integer=Math.floor(scope);


			    for(let i=0;i<integer;i++){
				    result.push(CLS_ON);
			    }
			    if(hasDecimal){
				    result.push(CLS_HALF)
			    }
			    while(result.length<LENGTH){
				    result.push(CLS_OFF)
			    }
			    return result

		    }
	    },

    }
</script>

<style lang="stylus" rel="stylesheet/stylus">
    @import "../../common/stylus/index.styl"
    .star
        font-size 0
        .star-item
            display: inline-block
            background-repeat no-repeat
        &.star-48
            .star-item
                width 20px
                height 20px
                margin-right 22px
                background-size 20px 22px
                &:last-child
                    margin-right 0
                &.on
                    bg-image('star48_on')
                &.half
                    bg-image('star48_half')
                &.off
                    bg-image('star48_off')
        &.star-36
            .star-item
                width 15px
                height 15px
                margin-right 16px
                background-size 15px 15px
                &:last-child
                    margin-right 0
                &.on
                    bg-image('star36_on')
                &.half
                    bg-image('star36_half')
                &.off
                    bg-image('star36_off')
        &.star-24
            .star-item
                width 10px
                height 10px
                margin-right 3px
                background-size 10px 10px
                &:last-child
                    margin-right 0
                &.on
                    bg-image('star24_on')
                &.half
                    bg-image('star24_half')
                &.off
                    bg-image('star24_off')

</style>
